The emission spectrum of a plasma of silane and nitrogen, excited by a radio frequency discharge, has been recorded with a high resolution Fourier transform spectrometer. We report here the first observation by IR spectroscopy of the X (2)SIGMA+ (upsilon = 1, 2) and A (2)PI(i) (upsilon = 2, 3, 4) vibrational levels of Si-28N-14, through the observation of 724 unperturbed transitions of the (1-0), (2-0), (2-1), (3-1), and (4-2) vibronic bands of the A (2)PI(i) - X (2)SIGMA+ system of this radical. The data were analyzed in a least squares fit procedure, with a standard deviation equal to 6 x 10(-4) cm-1.